The paper analyzes the social, linguistic and cultural diversity that exists in basic education classrooms in Mexico. Diversity is not a problem, but an opportunity to plan, design and develop educational policies that respond to the demands of the present. It affirms the pertinence of generating educational contents that arise from the context and the local experience, without losing of view that one lives in a globalized world. Finally, the contextualization of educational processes and curricular diversification is supported.